Figure 3
From: Anthropogenic influence on the changing risk of heat waves over India
Quantile regression analysis between heat waves and 3-month standardized precipitation index (SPI03) using data from all grids. Scatter plots of the maximum HWMId values for each grid location over India during the period 1961–2015 and the 3-month SPI preceding 1 month (a) and concurrent month (b). Inset figures display the spatial correlation maps of HWMId- SPI03. Panels (c) and (d) show the corresponding regression slopes for 0.1–0.99 quantiles of the maximum HWMId-SPI03. Black filled circles indicate the regression slope for different quantiles and shading indicates the associated uncertainty. The horizontal solid line represents the mean trend based on the ordinary least-squares method. (Figure was created using the Interactive Data Language (IDL) version 8.2 software, http://www.harrisgeospatial.com/docs/whats_new_in_82.html).
